B343 in Cygnus (June 6, 2015)

70% resolution available here.

This dark nebula in Cygnus is here framed by the light of ionized hydrogen.  On the right are two brighter ionization fronts; obviously the cloud is moving somewhere.  Nearby small dark nebulae spot the area.

Usually, I present images full-frame, but parts of this area are dim enough that I was unable to get a clean image in 4.5 hours.  This image is shrunk to about 70% of full frame.

Telescope: Astro-Tech AT111EDT and William Optics AFR-IV (eff. f/5.6)
Camera and Exposure: SXVF-H9 (Ha 11x1500"); Alnitak Flat-man flats
Filter(s): Astronomik 6nm Ha
Guiding: SX Lodestar and SX OAG
Mount: Takahashi NJP
Software: Nebulosity, PHD, Maxim DL, Photoshop CS3
Location: The Woodlands, TX